Features/Intel/PostCodeDebugFeaturePkg: add it.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2478

The PostCodeDebugFeaturePkg include some useful post code debug
libraries, such as get post code from status code and show it.

It provide a library PostCodeStatusCodeHandlerLib used by edk2
StatusCodeHandler.efi, used to show the post code.
It also provide a library of PostCodeMap lib, it map the status code
to post code.

Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Ming Tan <ming.tan@intel.com>
Reviewed-by: Eric Dong <eric.dong@intel.com>
Reviewed-by: Dandan Bi <dandan.bi@intel.com>

Features/Intel/Debugging/PostCodeDebugFeaturePkg/PostCodeDebugFeaturePkg.dsc

@@ -0,0 +1,30 @@
+## @file
+# This package provides PostCode Debug feature.
+# This package should only depend on EDK II Core packages, IntelSiliconPkg, and MinPlatformPkg.
+#
+# The DEC files are used by the utilities that parse DSC and
+# INF files to generate AutoGen.c and AutoGen.h files
+# for the build infrastructure.
+#
+# Copyright (c) 2020, Intel Corporation. All rights reserved.<BR>
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+##
+
+[Defines]
+  PLATFORM_NAME                  = PostCodeFeaturePkg
+  PLATFORM_GUID                  = 4ADE0B1A-7929-495D-A221-6576C7884CAC
+  PLATFORM_VERSION               = 0.1
+  DSC_SPECIFICATION              = 0x00010005
+  OUTPUT_DIRECTORY               = Build/$(PLATFORM_NAME)
+  SUPPORTED_ARCHITECTURES        = IA32|X64
+  BUILD_TARGETS                  = DEBUG|RELEASE|NOOPT
+  SKUID_IDENTIFIER               = DEFAULT
+  PEI_ARCH                       = IA32
+  DXE_ARCH                       = X64
+
+#
+# This package always builds the feature.
+#
+!include Include/PostCodeDebugFeature.dsc